Part 3 reworks comic book guru Frank Miller's unfilmed script for RoboCop2. The lost pages of the original storyline found it's way into the hands of director Fred Dekker, who took the discarded material and discovered in it the driving events for his sequel RoboCop3.

Dekker has refashioned Miller's untold tale of corporate war in the halls of mammoth Omni Consumer Products, class war in the streets of Old Detroit, and finally all-out war by those caught under the crush of OCP's policies as they decide to foment a full-fledged revolution.

Miller's Robo2 treatment was obviously written as the middle chapter of a trilogy. Like manu such middle installments, it ended on a down note, with the rebels realizing that the battle with OCP had only begun, that the bloodshed seen would be nothing compared to what was to come. In comparison, the end in Robo3 suggests the war is definitely over, and whatever adventures Alex Murphy may have beyond this installment, his time in Old Detroit is at an end. Crucial to the change in tone was Orion's decision to market Robo3 as a PG-13 film. While this sequel features many of Miller's original concepts, and some of his wit, the more unsparing aspects of his humor have been discarded.